The ceramic patch pipes for power plants are severely eroded and worn by the air-powder mixture and are subject to high pressure, especially on the elbows. Because the airflow changes the flow direction on the curved side, the outer side of the elbows is seriously worn.
The ceramic patch pipes for power plants are composed of three layers of steel parts, viscose, and ceramics. The steel parts are formed by 20# integral hot bending, and the ceramics are bonded to the inner wall of the steel parts by inorganic adhesive. It is installed with a staggered seam and arched joint and is cured by heating to form a firm anti-wear layer.
Ceramic patch pipes for power plants are suitable for pneumatic powder transportation, and their service life is more than 4-5 times that of ordinary wear-resistant pipes. It is widely used in pipeline systems such as pulverized coal, ash transportation, and desulfurization of power systems.
Ceramic technical parameters
| Items | Specifications | |
| Al2O3 | ≥95% | ≥ 99% |
| Density | >3.8g/cm3 | >3.83g/cm3 |
| HV10 | ≥1200 | ≥1300 |
| Rock Hardness HRA | ≥85 | ≥90 |
| Bending Strength MPa | ≥330 | ≥340 |
| Compression strength MPa | ≥1200 | ≥1300 |
| Fracture Toughness KIc MPam 1/2 | ≥4.0 | ≥4.2 |
| Volume wear | ≤0.02cm3 | ≤0.01cm3 |
The composition of the pipeline structure
| Composition | Thickness | Material | Process characteristics |
| steel | 6-8mm | 20# seamless pipe | Seamless molding, high strength, can withstand high pressure |
| viscose | 0.5-1mm | High temperature resistant inorganic compounds | Long-term operation at 350°C without aging, good thermal expansion, and strong adhesion |
| ceramics | 5mm | 95% | High density, super wear resistance, good toughness |
